Apparatus for heating street pavements



1,564,213 Dec. 1925 c. 'r. DENKER lPPmTUS FOR HEATING STREET PAVEMENTS Filed Am! 10, 1924 Patented Dec. 8, 1925.

airs!) STATES CHARLES T. DENKER, OF CHICAGO, ILLINOIS.

PATENT GFFHCE.

APPARATUS FOR HEATING STREET PAVEMENTS.

Application filed April 10, 1924. Serial No. 705,444.

To all whom it may concern.

Be it known that I, CHARLES T. DENKER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Apparatus for Heating Street Pavements, of which the following is a specification.

This invention relates to apparatus for heating street pavements and has for its object to provide an improvement on the device disclosed and claimed in my co-pending application, Serial No. 683,150, filed December 28, 1923.

In said application there was disclosed a device for heating street pavements and the like and comprising a hood through which heated fluid may be applied to a pavement or other surface. It has been found, however, that when in use where there is a strong wind there is often created a back draft which prevents the heated fluid from flowing as freely as it should, or that there is an increased suction, wasting the fluid and preventing its even distribution over the surface to which it is being applied.

It is therefore the object of my invention to provide means for regulating the escape of the heated fluid after it has come in contact with the pavement or other surface and to provide means for preventing interference with this escape from an external draft, such as, wind. 4

Further objects will be in part apparent and in part pointed out during the progress of the description.

In the drawings forming a part of this specification Fig. 1 is an elevation, partly in section, of my invention, and

Fig. 2 is a plan view thereof.

The heated fluid, as brought out in my copending application above referred to, enters the hood 1 by way of the conduit 2 and spreads out over the surface 3 which it is desired to heat. Obviously, the best results are obtained if this distribution of heat is uniform and to insure this result I provide means for regulating the escape of the heated fluid and preventing any interference therewith by external draft. The edges 4 of the hood are spaced from the surface by means of spacers 5, thus leaving a space for escape of the fluid after contact with the surface. Attached to the top of the hood near its edges and on each side thereof is a plate 6 bent to form a horizontal portion 7 and a vertical supporting portion 8. Formed on the horizontal portion 7 in any desired manner is a slideway 9 to receive a sliding damper 10. Each damper 10 is provided with a handle 11 for operating the same, and with a plurality of apertures 12 to register with corresponding apertures 13 in the horizontal portion 7 of the plate 6. In Fig. 2, the damper 10 is shown in a position wherein the apertures 12 and 13 are in register and the other dampers 10 are shown with the said apertures out of register.

By this arrangement it will be apparent that the members 8 provide a continuous curtain about the hood, preventing the entrance of external drafts and also foreign matter. Escape of the heated fluid, however, after it contacts with the surface of the pavement is permitted by means of the adjustable dampers 10 and it is obvious that these may be adjusted, as desired, to offset the effect of winds from any direction.

I am aware that changesin the form, construction and arrangement of parts may be made without departing from the spirit and without sacrificing the advantages of the intention and I reserve the right to make all such changes as fairly fall within the scope of the following claims.

I claim:

1. In a device of the character described, a hood for directing a fluid against a surface, a substantially vertical curtain secured a to said hood and spaced from the edge thereof and adapted to contact with said surface, and means disposed between the edge of said hood and said curtain to regulate the escape of said fluid.

2. In a device of the character described, a hood for directing a fluid against a surface, a curtain adjacent the edge of said hood and completely surrounding the same, said curtain being disposed so as to shield the edge of the hood from external drafts but permitting the escape of said fluid in a vertical direction, and means for regulating the escape of said fluid.

3. In a device of the character described, a hood for directing a fluid against a surface, means for spacing the edges of said hood from said surface to permit escape of said fluid, a curtain preventing escape of said fluid in a horizontal-direction, and a substantially horizontal member connecting said hood and said curtain and having openings therein to permit escape of said fluid in a vertical direction.

4. In a device of the character described,

a hood for directing a fluidagainst a s ur- 5 face, means for spacing the edges of said hood from said surface to permit escape oi said fluid, a curtain preventing escape of said fluid in a horizontal direction, a substantially horizontal member connecting said hood and said curtainand having openingstherein tp permit escape of said fluid in a Vertical direction, and means for varying the size v011E said. openings.

I CHARLES '1". DENKER. 

